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The value of different dwarfing genes in winter wheat breeding was studied using 6 near-isogenic lines carrying different Rht dwarfing genes over three years experiment.Results showed that both the Rht1 and Rht2 semi-dwarfing genes had significantlypositive effects on kernel number and grain weight per spike, and had significantlynegative effects on 1000-grain weight comparing to the tall line(rht) and the Rht3 line.The Rht3 dwarfing gene had a significantly negative effect on kernel number per spike,and had positive effect on 1000-grain weight. The combination of the Rht2 and Rht3 geneshowed significantly negative effect on yield components. All of these 5 dwarfing orsemidwarfing genotypes mentioned above had a significantly negative effect on plantheight and no significant effect on the area of flag leaf, spikelets per spike and spikelength.
The value of different dwarfing genes in winter wheat breeding was studied using 6 near-isogenic lines carrying different Rht dwarfing genes over three years experiment. Results showed that both the Rht1 and Rht2 semi-dwarfing genes had significantly positive effect on kernel number and grain weight per spike, and had significantly negative effect on 1000-grain weight comparing to the tall line (rht) and the Rht3 line. Rht3 dwarfing gene had a significant negative effect on kernel number per spike, and had positive effect on 1000-grain weight. combination of the Rht2 and Rht3 geneshowed significantly negative effect on yield components. All of these 5 dwarfing orsemidwarfing genotypes have over a significant negative effect on plantheight and no significant effect on the area of flag leaf, spikelets per spike and spikelength.